If x= root 2 -1 then find the value of (x-1/x)³ – InterviewSolution

1.	If x= root 2 -1 then find the value of (x-1/x)³
Answer» -STEP EXPLANATION:x=√2-11/x=√2+1. (by RATIONALIZATION)(x-1/x)^3=(√2-1-√2-1)^3=(-2)^3=-8

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